Improvement in coffee-pots



R. B. LA M B.

Coffee-Pots.

N0.l50,329. A PatemedApri|28,1a74.

UNITED STATES PATENT OFFICE.

RESTOBE B. LAMB, OF OAMDEN, NEW JERSEY.

IMPRovEMENT IN co'FFEE-PTS.

Specification forming part of Letters Patent No. 150,329, dated April28, 1874,' application liled February 16, 1874.

To all whom 'it may concern:

Be it known that I, Rnsronn B. LAMB, of the city and county of Camdenand the State of New Jersey, have invented a new and useful Improvementin Coffee-Pots; and l do hereby declare the following to be a clear andexact description of the nature thereof, suffi-l cient to enable othersskilled in the art to which my invention appertains, to fullyunderstand, make, and use the same, reference being had to theaccompanying drawings making part of this specification, in which-Figure l is a side elevation of the device embodying my invention. Fig.2 is a central vertical section thereof.

Similar letters of reference indicate corresponding parts in the twofigures.

The subject of thel invention is a portable and adjustable apparatusadapted for application to a common coffee-pot, and serving` to producea circulation otl water through the coffee,'which is contained in astrainer of a common form.`

Referring to the drawings, A represents the base of the device adaptedto be applied within a coffee-pot, which may be of usual form andconstruction. properly, of a rim or band, B, which rests on the bottomof the coffee-pot, and the lower edge of said rim should it snuglyagainst the adjacent portion of the inner face of the pot. A plate, G,is secured to the upper end of the rim B, and extends in an inclineddirection, the plate and rim constituting a bottomless vessel. From thehighest sideof the plate C there rises a tube, D, which may be made insections to adapt the device to various heights of coffee-pots, and tothe upper end of said tube is secured a receiver or reservoir, G, whichconsists of a cylindrical or other shaped vessel having a strainer, H,in its bottom, a cap or covering, J, at the top, and a side opening, K,which communicates with the tube. L represents a tube which depends orprojects from the bottom of the receiver G, or may be termed a downwardprolongation of the body of the receiver, and extends below the strainerH. One or more openings or perforations,

ing indicated in Fig. l.

The base consists,i

`of, the coee.

M, will be formed in the rim B at the lowest side of the base, or at theside opposite to the point of junction of the tube D, and plate C.

The operation is as follows: The ground coffee is placed in the receiverG, and the device described set in a coifee-pot, water being poured intothe latter either previ ously or subsequently, so that the bottom edgeof the projecting tube L will be en; tirely submerged, the level of thewater be;

When the water' boils, such as is within the base A is directed upwardlyunder the inclined top of the base A to the tube D, and ascends thesame, then enters the reservoir G, flows downwardly therethrough, and,escaping through the strainer H to the body of the pot, steeps and boilsthe coffee, and carries the fluid and volatile extracts through thevtube L into the water of the pot above the base A. Vhen the boilingwater leaves `the base A and ascends the tube D, its place is suppliedby the water above the base entering below through the opening M in therim B, and thus there is i.

a circulationV of water which has extracted some of the strength of thecoffee, and a subsequent circulation of iiuid which continues theextraction of, and re-extracts the strength aforesaid circulation. Theebullition of fluid above the base cannot reach the strainer H, and thusdisturb the regular motion of the circulating stream, since the downwardpower of the latter is greater than the upward tendency of the boilingfluid. The aroma or volatile matter is carried along-with the solid extracts, the latter uniting with the fluid in the pot, and the volatilematter passing through said uid, and impregnating the same so that thefull strength of the coffee is obtained and preserved.

It is evident that tea, and other articles of the class, may be readilyprepared by the device herein set forth. y

The top of the coffee-pot will hold the cap J of the receiver inposition, and in cases of great pressure inthe pot act as a valve.

Having thus described my invention, what l There is no interruption inthe jecting tube L, With the coffee-holder G and adjustable tube D, toeonduet the issuing liquid below the surface of that within the pot.

REsToRE '13. LAMB.

Witnesses:

JOHN A. WIEDERSHEIM, A. P. GRANT.

